Apple may have ordered a second round of 10 million iPhones based on the 3G network, according to Gartner analyst Ken Dulaney. Mr. Dulaney, who follows the iPhone for the research firm, based that on rumors he’s become aware of in Asia.

In a phone interview, Mr. Dulaney told the iPod Observer that he believes Apple has ordered a second round, amounting to 10 million more units, based on what he’s heard in Asian circles. This is in addition to the ten million first generation iPhones that Apple has said it will sell by the end of 2008.

Mr. Dulaney also speculated that that the so-called 3G iPhone will use an Organic Light Emitting Diode (OLED) display in the new iPhone. That would lead to a thinner phone and lower power consumption.

It was also surmised by Mr. Dulaney that Apple didn’t do as well as it expected in Europe with the 2.7G/EDGE network phone, hence the big movement to the 3G network iPhone.